Nov-22-2018, 09:51 AM
import pygame import time pygame.init() display_width = 600 display_height = 400 gameDisplay = pygame.display.set_mode((display_width,display_height)) white = (255,255,255) red = (255,0,0) clock = pygame.time.Clock() gameExit = False class Ball: def __init__(self,x,y,x_update,y_update): self.x = x self.y = y self.g= -10 self.t = 0.0001 self.x_update = x_update self.y_update = y_update def move(self): self.x += self.x_update self.y_update = self.y_update - (self.g * self.t) vy = self.y_update * self.t + (0.5 * self.g*(self.t**2)) self.y += vy if self.x > display_width - 15 or self.x < 15: self.x_update *= -1 if int(self.y+10)+self.y > display_height: self.y_update *= -1 pygame.draw.circle(gameDisplay,red,[self.x,int(self.y)],10,10) ball = Ball(300,200,5,0) while not gameExit: for event in pygame.event.get(): if event.type == pygame.QUIT: gameExit = True gameDisplay.fill(white) ball.move() pygame.display.update() clock.tick(30) pygame.quit() quit()I wanted to create gravity and a bouncing ball into this gravity.But I encountered a problem.Problem about ball's height.When ball was came the program's bottom border,bouncing ball's center as I far as I can see.How can I fix this problem?